Blast-furnace twyer.



.PATENTEDSEPT. 17, 1907.

H. SBIDLER. BLAST PURNAGB TWYER; APPLICATION FILED HAY 19, 1906.

Till-"mulls PETERS ca WASHINGTON. n. 1:.

UNITED STATES PATENT OFFICE.

BLAST-FURNACE 'IWYER.

Specification of Letters Patent.

Patented Sept. 17, 1907.

- Application filed May 19,1906. Serial No. 317,785.

To all whom it may concern:

Be it known that I, HENRY SnrnLnn, a citizen of the UnitedStates,residing at Great Falls, in the county of Cascade and State ofMontana, have invented certain new and useful Improvements inBlast-Furnace Twyers, of which the following is a specification.

This invention appertains to twyers for furnaces requiring a blast inorder to insure proper performance of the required work.

Twyers, as ordinarily constructed and applied to furnaces for smeltingore, frequently become choked and as a result considerable time isrequired to remove the slag as well as necessitating the expenditure ofmuch energy and causing great annoyance and vexation. Moreover, thetwyers, as generally provided, are not punched or cleaned as frequentlyas might be, because of the inconvenience and annoyances experienced bythe attendant in having the dust, loose stuff and the like blown intothe face or in close proximity thereto.

The invention is particularly adapted for twyers designed for smeltingfurnaces in which slag accumulates and frequently rises to such a levelas to enter the twyer and choke or otherwise interfere with the freeoperation thereof.

In accordance with the present invention the twyer is provided with anautomatic outlet whichis normally closed and which closure is destroyedby contact of slag or other material coming in contact therewith,whereby the surplus material or overflow finds a ready escape, therebypreventing choking of the twyer and at the same time apprising theattendant of the condition of the twyer. v

For a full description of the invention and the merits thereof and alsoto acquire aJmowledge of the details of construction of the means foreffecting the result,

reference is to be had to the following description and accompanyingdrawings, in which Figure 1 is a detail view of a portion of a smeltingfurnace provided with a twyer embodying the invention, said twyer beingin longitudinal section and having its outlet closed. Fig. 2 is a viewof the parts shown in Fig. 1 illustrating the automatic escape of theslag or overflow.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The twyer is adapted to be applied to any furnace or used wherever ablast is required, but its advantages are best appreciated when thetwyer is adapted to a smelting furnace'in which slag accumulates or thematerial is adapted to rise so as to overflow the blast inlets k Thefurnace 1 is preferably of the smelting type and is provided withabla'st inlet 2 which is registered with the twyer 3, the latter beingbolted or otherwise attached to the furnace to admit of its readyremoval for any purpose.

The twyer 3 is provided at one end with an opening 2 registering withthe blast inlet 2 of the furnace and the body of the twyer flares asshown from the opening 2 and is provided at its rear with three nippleextensions 4, 4 and 4 The nipple extension 4 is designed as a blast pipeconnection to which the blast pipe 5 is connected. The nipple t extendsrearwardly in a direct line with the upper horizontal wall of the twyerbody and in direct horizontal alinement with the open ing 2 andsubstantially of the same diameter of the said opening, and is flangedat its upper end to receive thereon the flanged cap 6 which is formedwitha tubular extension 6' surrounding an opening 7 in direct alinementwith the center of the opening 2*. The opening 7 is designed to receivea rod when it is necessary to punch the furnace or loosen the materialcollecting about the blast inlet 2. The remaining nipple 4 projectsrearwardly beyond the nipple 4' as shown and is in direct alinement withthe opening 2 but slants downwardly therefrom and forms a practicalcontinuation of the lower downwardly slanting wall 8 of the twyer bodyso as to produce the slag escape-way 8. This escape-way is adapted toquickly convey the slag or overflow to the outlet 9 of the nipple 4 saidoutlet being under normal conditions covered by means of a closure 10 ofsuch nature as to be destroyed by the molten slag or overflow cominginto contact therewith. The closure 10 may consist of a disk of lead orother material which will easily fuse and is retained in place by theflanged cap or clamp ring 11 which engages with the flange on the outerend of the said nipple. The clamp ring or cap 11, it will be seen, is,like the cap 6, provided with a tubular extension 11, formed with anopening extending therethrough, so that a rod may also be inserted inthis opening in lieu of the opening 7 after the closure 10 has once beendestroyed by the molten slag or even before its destruction, if desired.It is also to be noted that the nipple 4 is, like the nipple 4, ofsubstantially the same diameter as the opening 2 at the furnace end ofthe twyer body and is also in alinement therewith, it being readily seenthat a line drawn through the opening in the tubular extension 11 of thecap 11 will intersect the opening 2 just as a line drawn through theopening 7 will intersect said opening 2 Hence, it is manifest that a rodmay be inserted directly through the opening in the extension 11 andthrust straight into the furnace opening 2, if desired. It is also to benoted that the nipple 4" projects rearwardly to a greater extent thanthe nipple 4, to a sufficient degree that the caps 6 and 11 will neverinterfere with each other when being removed or attached in placealthough they are so close together as to produce a compactconstruction. All the nipples incline towards the opening 2, the nipples4 and 4" being directly in line with said opening,

while the nipple 4 preferably extends at right-angles to the nipple 4 asclearly illustrated in the drawing. It is also to be noted that thenipple 4 at which the fusible plug or closure 10 is located, extendsfarthest to the rear of all of said nipples, and beyond the blast pipeconnection and a considerable distance from the furnace crucible. Hencethe lower pipe or slag escape-way is carried out far enough, so thatwhen one of the twyers fills up with slag it burns away the fusible diskat the endof the slag escape-way, permitting the molten slag to run fromthe twyer. This stream of escaping slag falls entirely clear of thefurnace crucible, and does not burn out, by reflected heat, the fusibledisks in neighboring twyers, that do not happen to be themselves fillingwith slag.

Having thus described the invention, what is claimed as new is:

A blast furnace twyer consisting of a hollow body provided at one endwith an opening adapted to be registered with the blast inlet of thefurnace, said body flaring away from said opening and provided at itsrear end with an upper, intermediate and lower nipple, the upper nipplebeing arranged for the attachment thereto of a blast pipe,

and pointing away from said opening, the middle nipple projectingrearwardly at the rear or beyond the upper nipple with its upper wall inline with the upper wall of the remaining portion of the body and theopening through said nipple being of substantially the same diameter andin direct alinement with the opening at the furnace end of said body,and the lower nipple slanting downwardly and rearwardly from the openingat the furnace end of the body, the opening in said last named nipplebeing substantially of the same diameter as -th-esaid opening in thebody and being in alinement therewith, said lower nipple projectingrearwardly and located beyond the upper and middle nipples, caps securedon the ends of the middle and lower nipples, each of said caps beingprovided with an opening extending therethrough and said opening beinglocated in a plane or line which intersects the opening at the furnaceend of the twyer body, and a fusible closure clamped between the cap ofthe lower nipple and said nipple, as and for the purpose HENRY SEIDLER.[L. 3,]

Witnesses:

E. .T. HOLLAND, I. B. ARMSTRONG.

